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–+ servings
A Christmas monster cookie (a monster cookie with red and green M&Ms) on a white background.
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5 from 36 votes

Christmas Monster Cookies

These Christmas Monster Cookies are loaded with tons of yummy oats, peanut butter, M&Ms and more! They are the perfect Christmas treat to make this holiday season.
Prep Time10 minutes
Cook Time12 minutes
Total Time22 minutes
Course: Dessert
Cuisine: American
Servings: 24 cookies
Calories: 358kcal
Author: Audrey Wood
Cost: $10

Equipment

  • Large mixing bowl
  • Baking sheet
  • Parchment paper

Ingredients

  • 1 cup sugar
  • 1 cup brown sugar dark or light
  • ½ cup unsalted butter softened to room temperature
  • 1 teaspoon vanilla extract
  • 3 large eggs
  • 1 ½ cups creamy peanut butter *
  • ¼ teaspoon salt **
  • 2 teaspoons baking soda
  • ¼ cup all purpose flour
  • 4 ½ cups quick oats
  • 1 cup chocolate chips
  • 1 ¼ cup red and green candies such as M&Ms

Instructions

  • Begin by preheating your oven to 350 degrees. Line a baking sheet with parchment paper (not wax paper) or grease it well.
  • In a large mixing bowl, cream together the sugar, brown sugar, vanilla extract, and softened butter.
    1 cup sugar, 1 cup brown sugar, ½ cup unsalted butter, 1 teaspoon vanilla extract
  • Next, mix in the remaining ingredients except for the chocolate chips and M&Ms. Mix until well combined (do not over-mix).
    3 large eggs, 1 ½ cups creamy peanut butter, ¼ teaspoon salt, 2 teaspoons baking soda, ¼ cup all purpose flour, 4 ½ cups quick oats
  • Stir in the chocolate chips and M&Ms.
    1 cup chocolate chips, 1 ¼ cup red and green candies
  • Form rounded dough balls (about 3 tablespoons) and bake for 13 to 15 minutes. Be sure to leave room for the cookies to spread some. Let them rest for 10 minutes before transferring to a cooling rack. They will finish baking on the sheet.

Notes

Any nutritional information is an estimate by online calculators. Please verify using your own data.
Store any leftover cookies in an airtight container at room temperature. The cookies will be good for up to four days after baking.
*I recommend a regular creamy or smooth peanut butter, not a natural peanut butter (the consistency makes it hard to mix in).
**You may want to increase or reduce the salt depending on the sodium content of your brand of peanut butter.

Nutrition

Serving: 1 cookie | Calories: 358kcal | Carbohydrates: 45g | Protein: 7g | Fat: 18g | Saturated Fat: 7g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 6g | Trans Fat: 0.2g | Cholesterol: 32mg | Sodium: 203mg | Potassium: 190mg | Fiber: 3g | Sugar: 30g | Vitamin A: 172IU | Vitamin C: 0.1mg | Calcium: 45mg | Iron: 1mg